Rihanna is now the devil ... so says Drake -- the guy she used to bang.
Take a close look at this video ... Drake is singing "Days In the East" -- Monday night in Toronto during his OVO Fest -- when a fiery 6 appears, followed by an image of Rihanna, followed again by a 6, then another Rihanna and a 3rd 6.
It's unclear what turned Rihanna from Drake's girl into a satanic symbol. Drake has trashed her here and there, but it's one thing to have beef with your ex, and another to call her out as the devil.
